Disk grinding stand



M 1946. FRIEZ I DISK GRINDING STAND Filed March 23, 1945 2 Sheets-Sheet 1 INVENTOR.

RIENHOLD FRIEZ ATTDRNEYE March 19, 1946; R FRlEZ 2,396,843

DISK GRINDING STAND Filed March 23, 1945 2 Sheets-Sheet 2 INVENTOR.

RIENHOLD FRlEZ ATTDENEYS Patented Mar. 19Jl946 annals I UNE'E'ED STATES E A'E'EN'E" @EHQE DISK GRINDING STAND Reinhold Friez, Lemmon, S. Dali.

Application March 23, 1945, Serial No. 584,279% 7 Claims. (01. 51-104! My present invention, in its broad aspect, has to do with improvements in disk grinding stands, whereby disks to be ground against a rotating abrasive wheel are presented at a proper angle to the grinding wheel and at the proper tension, and below the axis of the grinding wheel, and means are provided for braking excessive speed of the disks being ground. More particularly, it is my purpose to provide an adjustable supporting stand for adisk to present the edge of the disk at an angle and below the axis of a rotating abrasive wheel, whereby the disc being ground will be slowly rotated, and to that end I provide an improved friction washer and friction arm, and means are provided for permitting an irregular disk to automatically adjust itself to the grinding or abrasive wheel. Furthermore, an improved brake prevents too rapid rotation of the disk being ground, and the stand is adjustable to different sizes of disks. sturdy in construction and has no parts which are likely to get out of order.

Other and equally important objects and advantages of my invention will be apparent from the following description and drawings, and it is pointed out that changes in form, size, shape, construction and arrangement of parts is permissible and within the purview of my broad inventive concept, and the scope of the appended claims.

In the drawings wherein I have illustrated a preferred form of my invention Figure 1 is a side elevation;

Figure 2 is a top plan View;

Figure 3 is a section on the line 3-33 of Figure 2;

Figure 4 is a section on the line ll of Figure 3;

Figure 5 is an end view on the line 5-5 of Figure 3;

Figure 6 is a detailed section through my disk and shows its relation to a grinding wheel, and

Figure 7 is a section on the line l''l of Figure 6.

In the drawings wherein, like characters of reference are used to designate like or similar parts throughout the several views- The numeral i designates the base which has a top plate 2 formed with an arcuate end 3 connected by curved webs d to a center piece 5 having an angularly extending end it. The three supporting legs (i are at the ends of the arcuate end 2 and at the base of the angular end 6 to give a three-point support. Pivotally mounted on a bolt My device is simple and 1 extending through the piece 5 of the base is as the disk supporting arm 8. The bolt has a nut 1 with a U-shaped turning grip l to facilitate tightening and loosening the same, and a spacing washer 'i supporting the arm. The arm is adjusted by loosening the bolt. Also mounted on the bolt '1 is a rod 9 having a slot H3 and la ball-shaped end ii. The bolt extends through the slot to to mount-the rod for longitudinal adjustment, and the end of the rod opposite the end H has side flanges l2 fitting down against the sides of the supporting arm 8 to hold the rod in position. Between the bolt 7 and the end H the rod is turned upwardly at an angle, as shown at l3--see Figure 1. The supporting arm has a hand grip id and a lateral ear l5 adjacent the hand grip which carries a pin it pivotally engaged by a coupling head I? at one end of the adjusting rod #8 which is threaded at l9 and slidably mounted in a bearing on the angular end 6 of the top plate.v A hand wheel 2| is mounted on the threads of rod l8 and has a handle 22 to be turned to adjust the position of the supporting arm 8, anda spring 23 is positioned about the rod l8, between the bearing 20 and the coupling head ll of the rod. Adjustment of the rod is against the tension of spring 23 so that the rod has a certain resiliency in its adjusted positions. A tubular arm 2 is pivotally mounted as at 25 on the pin I6, and slidably carried therewithin is a threaded telescoping extension 25. The arm 2 has a slot intermediate its ends bridged by the piece 2i to receive an adjusting wheel 28 which works in the slot to feed the extension in and out of the arm. A lateral key 29 on the extension 26 fits in a slot 30 in the arm to prevent independent turning movement of the extension with respect to the arm. Pivotally and slidably mounted on the bolt 3| on the arm 8 is a bracket 32 having a slot 33 through which the bolt is engaged and which is pivotally attached, as at 34 to an ear B i on the arm '2 to support its free end.

The disk 35 to be ground is rot-atably mounted on the pin 36 on the end of the arm 8. The pin is threaded as at 31 to receive a nut 38, and a spring 39 is supported about the pin and bears against the nut 38 and a bearing washer 40 facing against the disk. The washer to has a finger H and the nut 38 has Wings 62. The disk, which being securely supported on the arm 8 has a certain amount of adjustment by reason of the spring 39 against pressures exerted against the edge of the disk. An abrasive or grinding wheel 43 carried on the shaft 54 is designed to grind the edge of the disk, and the arm is adjusted with a certain amount of resilience to support the edge of the disk at an angle and below the axis of rotation of the grinding wheel, as shown in Figures 2 and 6, whereby the disk is ground and at the same time slowly rotated, and in the event of any irregularities in the disk the spring 39 provides automatic adjustment of the disk. The angular inclination of the disk to the grinding wheel is adjusted by the hand wheel 2| which adjusts the angle of the supporting arm 8 in the top plate against the pressure of spring 23. The ball-head II on the rod 9 frictionally bears against the disk to serve as a brake against too rapid rotation, and by adjustment of the extension 26 of the arm 24 through wheel 28 the proper pressure is applied to the disk through the roller 45 at the end of the extension 26 to insure proper grinding.

From the foregoing it is believed that the operation and advantages of my invention will be apparent, but it is again emphasized that interpretation of its scope should only be conclusive when made in the light of the subjoined claims.

I claim:

1. An adjustable supporting device to be used to present-disks to grinding wheels, comprising a supporting base, a disk supporting arm pivotally mounted on the base to present the edge of the disk at an angle and below the rotating axis of the grinding wheel, an adjusting rod connected with the base and engaging the supporting arm to adjust the angle of the disk to the grinding wheel, means on the adjusting rod for resiliently holding the arm in adjusted position, a brake rod adjustably mounted on the supporting arm and having an end frictionally engaging the disk, means for resiliently mounting the disk on the end of the arm, and an adjustable pressure means engaging the disk to regulate the pressure of the disk on the grinding wheel.

2. The invention as defined in claim 1, wherein the supporting base has an arcuate end, an intermediate bar, and an angular extension on the bar formed with a bearing supporting the adjustin rod for the disk supporting arm.

3. The invention as defined in claim 1, wherein the supporting arm has an end pin on which the disk is rotatably mounted, a nut on the pin, a bearing washer, and a spring between the nut and the bearing washer to resiliently hold the disk on the pin.

4. The invention as defined in claim 1, wherein a pin is mounted on the supporting arm to which both the adjusting rod and the pressure means is attached.

5. The invention as defined in claim 1, wherein the pressure means includes a hollow rod, an extension slidably mounted on the hollow rod and carrying a rollerengaging the disk, said extension being threaded, a hand wheel for adjusting the extension with respect to the hollow rod,

means for preventing rotation of the extension in the hollow rod, and a bracket adiustably supporting the hollow rod on the disk supporting arm.

6. The invention as defined in claim 1, wherein a bolt carried by the base is engaged by both the brake rod and the disk supporting arm, and wherein the brake rod is angled upwardly toward the disk and has a ball-shaped friction head engaging the disk.

7. The invention as defined in claim 1, wherein a bolt carriedby the base is engaged by both the brake rod and the disk supporting arm and wherein the brake rod has end flanges engaging about the sides of the disk supporting arm, and is slotted to slidably mount the same on the bolt, and has an'upwardly angled end formed with a ball-shaped friction head.

' REINHOID FRIEZ. 

